US3708616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color tv reproduction unit using laser beams
Assignee: Robert Bosch Fernsehanlagen GmbH
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Filing: 1970-11-02
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Granted: 1973-01-02
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Expires: 1990-11-02
Abstract
Abstract A color television system using modulation and mechanical deflection to project several different monochromatic light beams onto a screen to form picture dots in a raster. Delay line systems is used to control modulation to correct for color errors and geometric distortion.
Inventors
- 👤 Felgel R Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:15
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3129
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
In a color television reproduction system for the projection of a color television image upon a screen comprising: A. source means for providing several, essentially monochromatic, light beams, B. means for amplitude modulating the beams in response to respective signals associated with respective individual types of colors, and C. deflection means for horizontally and vertically deflecting the light beams for describing a raster on said screen, the improvement comprising: D. optical means for adjusting the beams to line up in parallel, prior to deflection, and to hit the screen in three different places, and E. adjustable delay-line means for correcting the color error resulting from the relative displacement of light dots on the screen and connected to the modulating means whereby simultaneous color signals can be reproduced on the screen in a more visually acceptable form.
Claim 2
Dependent Claim
136 words
In a color television reproduction system for the projection of a color television image upon a screen comprising: A. source means for providing several, essentially monochromatic, light beams, B. means for amplitude modulating the beams in response to respective signals associated with respective individual types of colors, and C. deflection means for horizontally and vertically deflecting the light beams for describing a raster on said screen, the improvement comprising: D. optical means for adjusting the beams to line up in parallel, prior to deflection, and to hit the screen in three different places, and E. adjustable delay-line means for correcting the color error resulting from the relative displacement of light dots on the screen and connected to the modulating means whereby simultaneous color signals can be reproduced on the screen in a more visually acceptable form.
Claim 3
Dependent Claim
17 words
A television reproduction system according to claim 1, wherein the beams occur in parallel in one plane.
Claim 4
Dependent Claim
39 words
Television reproduction unit according to claim 1, comprising a combination of one convex and one concave cylinder lens for the parallel line-up of the Beams, whereby the interval between the individual beams amounts to just a few image dots.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |